THISTLE FAMILY. 771 



ISOPAPPUS Torr. & Gray, Fl. N. A. 2 : 239. 1842. 



Two species, North America, Atlantic and. Western. 



Isopappus divaricatus (Nutt.) Torr, & Gray, Fl. N. A. 2 : 239. 1842. 



SPREADING GOLDEN ASTER. 



Intila (Chrysopsis) divaricata, Xutt. Gen. 2 : 152. 1818. 



ApJopappus diraricatus Gray, Syn. Fl. N. A. 1, pt. 2 : 130. 1884. 



Gray, Man. ed. 6, 245. Chap. Fl. 215. Gray, Syn. Fl. N. A. 1. c. Coulter, Contr. Nat. 

 Herb. 2 : 187. 



Carolinian and Louisiauian areas. Southern Kansas to central Texas, and Florida 

 to Georgia. 



ALABAMA : Lower hills. Central Prairie region. Dry sandy exposed places, road- 

 sides. Chambers Comity (E. A. Smith). Talladega County, Sylacauga. Montgom- 

 ery County. Flowers yellow; September, October. Local and frequent. 



Type locality : "In the vicinity of Savannah in Georgia, common." Discovered by 

 Dr. Baldwyn. 



Herb. Geol. Surv. Herb. Mohr. 



CHONDROPHORA Raf. New Fl. N. A. 4 : 79. 1836. 

 (BiGKLOWiA DC. Prodr. 5 : 329. 1836. Not Spreng.) 



Two species, perennials, eastern North America. 

 Choiidrophora nudata (Michx.) Brittou, Mem. Torr. Club, 5 : 317. 1894. 



Chrysocoma nudata Michx. Fl. Bor. Am. 2 : 101. 1803. 



Biaelovla nudata DC. Prodr. 5 : 329. 1836. 



Ell. Sk. 2 : 309. Gray, Man. ed. 6, 246. Chap. Fl. 215. Gray, Syn. Fl. N. A. 1, pt. 2 : 

 141. 



Carolinian and Louisianian areas. Virginia, along the coast to Florida and east- 

 ern Louisiana. 



ALABAMA : Coast plain. Low pine barrens. Mobile and Baldwin counties. Flow- 

 ers yellow ; September, October. Very common. 



Type locality : "Hab. in humidis Carolinae." 



Herb. Mohr. 



Choiidrophora virgata (Nutt.) Greene, Erythea, 3 : 91. 1895. 



Chrysocoma viryata Nutt. Gen. 2 : 137. 1818. 



Bigeloria nndata var. viryata Torr. & Gray, Fl. N. A. 2 : 232. 1842. 



Chondropltora nudata viryata Brittou, Mem. Torr. Club, 5 : 317. 1894. 



Nearly allied to the above by its inflorescence and the morphological characters 

 of the flowers, but differing widely in its habit o f growth, range of distribution, 

 and foliage, and deserving to be recognized as a distinct species. The many-headed 

 rootstock produces numerous stout shoots crowded with the filiform leaves, forming 

 dense tufts. In the Alabama specimens and others from Louisiana all the leaves 

 are filiform. It is only in a specimen from Texas that a tendency can be observed 

 to the development of a wider leaf blade. These linear lanceolate leaves found in 

 young shoots are not over ^ inch wide, acute, channeled toward the base and with- 

 out lateral nerves. 



On comparison with Nuttall's type in the herbarium of the Academy of Science, 

 Mr. Thomas Meehau finds the Alabama plant identical with Nuttall's specimen, on 

 which the radical leaves are wanting. Nuttall says: "Nearly allied to Chrysocoma 

 nudata, but distinct, and resembles more Solidayo tcnuifolia, with which it mingles 

 and is easily confounded." 



Carolinian ( ? ) and Louisianian areas. New Jersey ( ? ), western Louisiana (Hah), 

 Texas, (Riddell) . 



ALABAMA: Mountain region. Damp mossy rocks. Dekalb County, Lookout 

 Mountain, rocky banks of Little River above the falls, 1,800 feet. August, September. 



Type locality : " On the borders of swamps in New Jersey, near the seacoast." 

 (Has never been found since in that State.) 



Herb. Geol. Surv. Herb. Mohr. 



BRINTONIA Greene, Erythea, 3 : 89. 1895. 

 One species. Eastern North America. 

 Brintoiiia discoidea Greene, Erythea, 3:89. 1895. 

 Solidayo discoidea Torr. & Gray, Fl. N. A. 2 : 195. 1842. 

 Aater discoideiis Ell. Sk. 2 : 358. 1821. 



Ell. Sk. 1. c. Chap. Fl. 208. Gray, Syn. Fl. N. A. 1, pt. 2 : 144. 

 Louisianiau area. Georgia to Florida, west to Louisiana. 



